<template>
  <!-- 鼠标移入移出 -->
  <li
    @mouseenter="isEnter = true"
    @mouseleave="isEnter = false"
    :style="{ background: isEnter ? '#ccc' : '' }"
  >
    <label>
      <!-- 给表单添加change事件 -->
      <input type="checkbox" @change="updateDone(id)" :checked="done" />
      <!-- 以数据的内容渲染 -->
      <span>{{ content }}</span>
    </label>
    <!-- 设置删除按钮的样式隐藏，实现移入移出效果 -->
    <button
      class="btn btn-danger"
      :style="{ display: isEnter ? 'block' : 'none' }"
      @click="deleteOne(id)"
    >
      删除
    </button>
  </li>
</template>

<script>
export default {
  name: "Item",
  // props接收父组件的数据，可以是对象或数组
  props: ["id", "done", "content", "todo", "updateDone", "deleteOne"],
  data() {
    return {
      isEnter: false,
    };
  },
};
</script>

<style>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
li .done {
  color: #666;
  text-decoration: line-through;
}
</style>
